mark.bitterlich(at)navy.m
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 Posted: Wed Mar 08, 2017 1:34 pm Post subject: [Non-DoD Source] Re: Air Tank Cocktail |
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Craig, my feelings regarding this issue are easy to understand. The owner of any Experimental Aircraft has tremendous latitude on what can be done with same. You as the owner can do whatever you want, add whatever you want, inject whatever you want, etc. I am not trying to tell you what you can, or cannot do, with your personal aircraft.
Where I take exception is when someone starts promoting what they believe is a "logical and good idea" to other aircraft owners that has the POTENTIAL to cause bad things to happen, based on nothing other than personal logic and here-say, as in "someone else told me that this is a good idea", followed by the words: "I've done it and it works great!".
Lots of folks think that if they do something, then of course it must be right, and that everyone else should do it too, and if any person in that chain of events OBJECTS to that kind of thing, they take it as a personal slight or insult. It was not meant as that. There is absolutely nothing personal intended. What I am saying is that the YAK-List, or *ANY* list is a wonderful tool for learning all kinds of good stuff. It also is a tool that can be dangerous to every pilot reading it. As I said, I followed the instructions everyone on the Yak-List at the time recommended and it came real close to causing me a gear up landing.
The interesting thing here is that there has been absolutely zero response to my suggestion that the aircraft owner contact an FAA Maintenance Inspector and ask that person about adding ANY type of fluid to a pneumatic system that is not covered in the publications. The reason why not is that most everyone here would agree that the FAA is never going to bless such a move.
So the bottom line is this: Just because you can do a thing, doesn't mean you should do a thing. And with my extensive experience with many makes and models of aircraft that use pneumatic systems, I would strongly suggest that readers of this list NOT put antifreeze into their pneumatic systems. You and your mechanic are welcome to espouse the practice. But I am also just as welcome to advise anyone reading this conversation that adding antifreeze to their pneumatic system has never been scientifically tested, is not advised by any maintenance manual, is not blessed by the FAA, or the aircraft manufacturer and comes with a potential risk. If the owners consider that risk and decide to follow your advice regardless, so be it. It is as I said to begin with, "their Experimental Aircraft". Just remember too, that should something bad happen and there is an accident investigation, you can count on the FAA to ask: "Why does there appear to be anti-freeze in your pneumatic system?" The answer of: "I read it on the YAK-List" is not going to count for very much.
It is taking a chance .. plain (plane?) and simple. Every owner can made that choice him or herself.
Mark
p.p.s. Craig, at one time it was indeed advised ON THIS LIST to add MMO into the pneumatic system.
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